Radio frequency unfreezing device and refrigeration equipment

Abstract

The radio frequency unfreezing device provided by the embodiment of the utility model comprises a main body, a waveguide piece and a detector, the main body is provided with an unfreezing cavity for accommodating articles; the waveguide piece is installed on the main body, at least part of the waveguide piece is located outside the unfreezing cavity, and the waveguide piece is provided with a waveguide channel communicated with the unfreezing cavity; the detector comprises a circuit board and a probe arranged on the circuit board, the detector is installed on the side, away from the unfreezing cavity, of the waveguide piece, and the probe can receive feedback signals of objects in the unfreezing cavity through the waveguide channel.

Description

Technical Field

[0001] This application belongs to the field of household appliance technology, and in particular relates to a radio frequency defrosting device and a refrigeration equipment. Background Technology

[0002] To address EMC (Electromagnetic Compatibility) issues, common microwave shielding methods primarily utilize metal enclosures. Radio frequency defrosting devices need to achieve intelligent defrosting of frozen food within the enclosure. This is achieved by using infrared technology to detect and monitor the infrared radiation emitted from the food's surface to determine its temperature, offering advantages such as non-contact operation, rapid response, and high precision.

[0003] In related technologies, installing infrared sensors on the surface of the refrigerator requires drilling holes in the surface and installing the infrared probes at the drilling locations to monitor the temperature of the food inside. However, for refrigerator radio frequency defrosting systems, the frequency is a non-exempt band, and the drilling locations where the probes are installed will cause significant radiation leakage. Furthermore, the leaked signals will couple to the infrared probe circuitry and radiate again through its corresponding signal transmission lines, resulting in severe EMC radiation exceeding the standards for the entire system. Summary of the Invention

[0004] This application aims to at least partially solve the technical problem in related technologies where the opening location for installing probes causes significant radiation leakage, resulting in severe EMC radiation exceeding the standards of the entire system. To this end, this application provides a radio frequency defrosting device and a cooling equipment.

[0005] In a first aspect, embodiments of this application provide a radio frequency defrosting device, characterized in that it includes:

[0006] The main body has a thawing chamber for holding items;

[0007] A waveguide is mounted on the main body, and at least a portion of the waveguide is located outside the thawing cavity, the waveguide having a waveguide channel communicating with the thawing cavity;

[0008] The detector includes a circuit board and a probe disposed on the circuit board. The detector is mounted on the side of the waveguide away from the thawing chamber, and the probe is capable of receiving feedback signals from the items inside the thawing chamber through the waveguide channel.

[0009] In the radio frequency defrosting device proposed in this application embodiment, since the waveguide has a waveguide channel communicating with the defrosting cavity, and the detector is installed on the side of the waveguide away from the defrosting cavity, the microwave signal in the defrosting cavity will be transmitted in the waveguide channel, and the signal strength will be significantly attenuated during the transmission process, thereby greatly reducing the radiation transmitted to the detector and reducing the EMC radiation leakage of the entire system.

[0010] In some embodiments, the main body also has a mounting hole communicating with the thawing chamber, and the waveguide is disposed in the mounting hole and connected to the main body.

[0011] In some embodiments, the radio frequency defrosting device further includes a first connector connected to the circuit board and connected to the waveguide, with the probe positioned corresponding to the waveguide channel.

[0012] In some embodiments, the radio frequency defrosting device further includes a second connector disposed on the outer surface of the waveguide, and the first connector and the second connector are detachably connected.

[0013] In some embodiments, the waveguide includes a mounting member and a waveguide, the mounting member being disposed in the mounting hole and connected to the main body, the mounting member having a mounting channel communicating with the thawing chamber, at least a portion of the waveguide being mounted within the mounting channel and connected to the circuit board, the waveguide channel being disposed within the waveguide.

[0014] In some embodiments, at least a portion of the outer wall of the waveguide is provided with external threads, and at least a portion of the inner wall of the mounting channel is provided with internal threads that engage with the external threads.

[0015] In some embodiments, the mounting component includes a connecting portion and a mounting portion disposed within the connecting portion. The connecting portion is connected to the main body, and the mounting channel is disposed in the mounting portion. A stop edge is provided at the end of the mounting portion away from the detector, and at least a portion of the waveguide is inserted into the mounting channel and abuts against the stop edge.

[0016] In some embodiments, the stop edge is provided around the end of the mounting portion to form a connecting hole that connects the waveguide channel and the thawing chamber.

[0017] In some embodiments, the connecting hole is coaxially arranged with the waveguide channel, and the radius of the connecting hole is larger than the radius of the waveguide channel.

[0018] In some embodiments, the connecting portion is connected to the outer surface of the housing, the mounting portion is disposed in the mounting hole, and both ends of the mounting portion extend out of the connecting portion.

[0019] In some embodiments, the main body has a mounting surface, and the waveguide is mounted on the mounting surface at an angle to it, such that the axis of the waveguide channel coincides with the center of the bottom surface of the thawing chamber.

[0020] Secondly, this application provides a refrigeration device, including a cabinet and the radio frequency defrosting device described above, wherein the radio frequency defrosting device is disposed inside the cabinet.

[0021] The beneficial effects of the refrigeration equipment provided in the second aspect are the same as those of the radio frequency defrosting device provided in the first aspect, and will not be repeated here. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 A block diagram of the radio frequency defrosting device is shown.

[0024] Figure 2 A partial structural diagram of the radio frequency defrosting device is shown. Figure 1 .

[0025] Figure 3 A schematic diagram is shown showing the detector receiving infrared radiation from an object through a waveguide channel.

[0026] Figure 4 A partial structural diagram of the radio frequency defrosting device is shown. Figure 2 .

[0027] Figure 5 It shows Figure 4 A partial sectional view.

[0028] Figure 6 A partial structural diagram of the radio frequency defrosting device is shown. Figure 3 .

[0029] Figure 7 It shows Figure 6 A partial sectional view.

[0030] Figure label:

[0031] 10-RF defrosting device, 15-Tuning board, 16-Electrode plate, 17-Tuning inductor, 19-RF generator assembly, 19a-Power supply module, 19b-Control module, 19c-Power amplifier module, 19d-Detector circuit, 19e-Power amplifier circuit, 19f-Signal source, 20-Item, 100-Main body, 110-Defrosting chamber, 140-Mounting hole, 150-Mounting surface, 200-Waveguide, 210-Mounting component, 21 1-Connecting part, 212-Mounting part, 212a-Mounting channel, 212b-Internal thread, 213-Stop edge, 214-Connecting hole, 215-Stepped structure, 220-Waveguide, 221-Waveguide channel, 222-External thread, 300-Detector, 310-Circuit board, 320-Probe, 321-Infrared light, 330-Signal line, 400-First connector, 410-Connecting channel, 500-Second connector. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0033] It should be noted that all directional indications in the embodiments of the present invention are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0034] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0035] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0036] Please see Figure 1 The radio frequency defrosting device 10 is installed inside the refrigeration equipment to rapidly defrost frozen food within the equipment, thereby meeting the multifunctional needs of the refrigeration equipment. For example... Figure 1 As shown, the radio frequency defrosting device 10 includes a radio frequency generation component 19, which includes a power supply module 19a, a power amplifier module 19c, and a control module 19b. The power supply module 19a, the power amplifier module 19c, and the control module 19b are all electrically connected. The power supply module 19a supplies power to the power amplifier module 19c and the control module 19b. The power amplifier module 19c generates an initial signal at a set frequency. The control module 19b controls the operation of the circuits in the power supply module 19a and the power amplifier module 19c. When it is necessary to adjust the output power of the power amplifier module 19c, the control module 19b calculates a voltage regulation control command based on an internal algorithm and sends it to the power supply module 19a. The power supply module 19a then adjusts the voltage to change its output voltage.

[0037] The power amplifier module 19c includes a signal source 19f, a power amplifier circuit 19e, and a detector circuit 19d. The signal source 19f is used to generate an initial signal at a set frequency (40.68MHz). The power amplifier circuit 19e is used to amplify the power of the initial signal, enhance its power, and output the power amplifier signal. The detector circuit 19d is used to detect the output power of the power amplifier signal and the reflected power, and feeds it back to the control module 19b.

[0038] The radio frequency defrosting device 10 also includes a tuning board 15, a tuning inductor 17, and an electrode 16. The tuning inductor 17 and the electrode 16 are electrically connected, and the tuning board 15 is electrically connected to the power amplifier module 19c. After receiving the power amplifier signal, the electrode 16 radiates radio frequency energy to the food to defrost it quickly.

[0039] Specifically, the signal source output module is the source of the radio frequency (RF) signal, capable of outputting a fixed-frequency RF signal. This RF signal is amplified stage by a power amplifier before being output to the load (i.e., the food placed inside the drawer assembly). The RF generation component 19 can detect the RF signal at the load end in real time, detecting the output power and reflected power of the power amplifier signal and feeding this information back to the control module 19b. The control module 19b controls the tuning board 15 and the tuning inductor 17 based on the detection results, working together to achieve optimal impedance matching, maximizing power output to the load, and effectively reducing power reflection in the system.

[0040] Of course, the RF signal output terminal of the RF generator assembly 19 can also be directly connected to the electrode plate 16 via a coaxial cable. The output frequency can be adjusted by the real-time detection and control module 19b of the RF generator assembly 19 to achieve impedance matching and stable power transmission. That is, the control module 19b adjusts the output frequency according to the detection results to achieve the best impedance matching state, so that the power is output to the load as much as possible, preventing power reflection in the system and ensuring stable transmission of RF power.

[0041] In related technologies, microwave shielding is commonly achieved through metal enclosures to address EMC issues. Radio frequency (RF) defrosting devices need to intelligently defrost frozen food inside the enclosure. They determine temperature by detecting and monitoring infrared radiation emitted from the food's surface using infrared technology, offering non-contact, rapid response, and high precision. During defrosting, the food temperature is monitored in real time, and the system immediately stops operating upon completion to prevent incomplete or over-defrosting, making the entire defrosting system more intelligent, convenient, and achieving a more perfect defrosting effect.

[0042] Infrared temperature probes work on the principle of thermal radiation characteristics. Any object with a temperature above absolute zero emits infrared radiation. The infrared sensor inside the probe receives this radiation from the object's surface, converts it into an electrical signal, and then amplifies, filters, and processes it to convert it into a numerical value corresponding to the temperature. Its advantage is that infrared temperature probes do not require contact with the object being measured, avoiding cross-contamination and damage. Currently, infrared temperature sensors are installed in many intelligent heating devices such as microwave ovens for use in their temperature control systems. They can adjust the heating power based on real-time temperature to achieve precise temperature control. Furthermore, the sensors can perform non-contact measurements, avoiding the problems of ordinary sensors failing to function properly and being easily damaged in high-power microwave environments.

[0043] Installing an infrared sensor on the surface of the enclosure requires drilling holes in the surface and mounting the infrared probe at these holes to monitor the temperature of the food inside. Microwave ovens and similar devices use frequencies exempt from EMC regulations, so there's no need to consider EMC radiation exceeding limits due to the drilling holes for the infrared sensor. However, for radio frequency defrosting devices used in refrigeration equipment, the frequency is a non-exempt band. The drilling locations for the probes can cause significant radiation leakage, and the leaked signal can couple to the infrared probe circuitry, radiating again through its signal transmission lines, resulting in severe EMC radiation exceeding limits for the entire system.

[0044] In order to improve the problems existing in the related technologies to a certain extent, this application provides a radio frequency defrosting device and a cooling device, which can significantly reduce the radiation transmitted to the detector and reduce radiation leakage.

[0045] This application is described below with reference to the accompanying drawings and specific embodiments:

[0046] Please see Figure 2 The radio frequency defrosting device 10 provided in this application embodiment is applied to a refrigeration device and can significantly reduce the radiation transmitted to the detector 300 and reduce radiation leakage.

[0047] Please see Figure 2 and Figure 3 In this embodiment, the radio frequency defrosting device 10 includes a main body 100, a waveguide 200, and a detector 300. The main body 100 has a defrosting cavity 110 for accommodating an article 20; the waveguide 200 is mounted on the main body 100, and at least a portion of the waveguide 200 is located outside the defrosting cavity 110, and the waveguide 200 has a waveguide channel 221 communicating with the defrosting cavity 110; the detector 300 includes a circuit board 310 and a probe 320 disposed on the circuit board 310, the detector 300 is mounted on the side of the waveguide 200 away from the defrosting cavity 110, and the probe 320 can receive feedback signals from the article 20 inside the defrosting cavity 110 through the waveguide channel 221.

[0048] The main body 100 is the basic component of the radio frequency defrosting device 10, providing installation and protection for other components of the device. The defrosting chamber 110 is used to hold the item 20 to be defrosted. The main body 100 also has an electrode plate 16, which radiates radio frequency energy into the defrosting chamber 110, thereby defrosting the item 20 within the chamber. The main body 100 is made of metal, which shields the radiation within the defrosting chamber 110.

[0049] The waveguide 200 is mounted on the main body 100, and at least a portion of the waveguide 200 is located outside the thawing chamber 110. This means that part of the waveguide 200 may be located outside and part inside the thawing chamber 110, or the entire waveguide 200 may be located outside the thawing chamber 110; there is no limitation on this. The waveguide 200 is made of metallic material. The detector 300 is mounted on the side of the waveguide 200 away from the thawing chamber 110; that is, the detector 300 is mounted on the main body 100 via the waveguide 200 and is also located outside the thawing chamber 110.

[0050] Since the waveguide 200 has a waveguide channel 221 that communicates with the thawing cavity 110, the microwave signal in the thawing cavity 110 will be transmitted in the waveguide channel 221. During the transmission process, the microwave signal will be continuously reflected in the waveguide channel 221, which will cause the signal strength to be significantly attenuated, thereby greatly reducing the radiation transmitted to the detector 300, reducing radiation leakage, and making the EMC radiation of the entire system meet the standards.

[0051] The detector 300 includes a circuit board 310 and a probe 320 disposed on the circuit board 310. Since the probe 320 can receive feedback signals from the item 20 inside the thawing chamber 110 through the waveguide channel 221 (i.e., the feedback signals from the item 20 inside the thawing chamber 110 can be transmitted to the probe 320 via the waveguide channel 221), the placement of the waveguide component 200 does not affect the normal operation of the detector 300. Specifically, the probe 320 can be positioned directly opposite the central axis of the waveguide channel 221, ensuring that the waveguide component 200 does not obstruct the probe 320, thereby maximizing the detection accuracy of the probe 320.

[0052] The detector 300 can be an infrared detector, and the probe 320 is an infrared probe. The detector 300 also includes a signal line 330. The infrared probe 320 is the core component of the infrared detector 300 circuit. It is used to receive infrared radiation from the surface of the object 20, and then the circuit board 310 converts the detection signal into an electrical signal, which is then transmitted and processed through the signal line 330.

[0053] Please see Figure 3 In some embodiments, the main body 100 also has a mounting hole 140 communicating with the thawing chamber 110, and the waveguide 200 is disposed in the mounting hole 140 and connected to the main body 100.

[0054] It is understandable that at least a portion of the waveguide 200 is located outside the thawing chamber 110, and the waveguide 200 has a waveguide channel 221 communicating with the thawing chamber 110. Therefore, the main body 100 must have an opening to allow the waveguide channel 221 to communicate with the thawing chamber 110. The waveguide 200 is disposed in the mounting hole 140; that is, the waveguide 200 can be disposed within the mounting hole 140, with the waveguide channel 221 directly communicating with the thawing chamber 110, or it can be disposed at the edge of the mounting hole 140, with the waveguide channel 221 communicating with the thawing chamber 110 through the mounting hole 140. When part of the waveguide 200 is located outside the thawing chamber 110, and part is located within the thawing chamber 110, the waveguide 200 is disposed within the mounting hole 140. When the entire waveguide 200 is located outside the thawing chamber 110, the waveguide 200 is disposed at the edge of the mounting hole 140.

[0055] Waveguide 200 can be welded to the main body 100 to make a sealed connection between waveguide 200 and main body 100, thereby minimizing the leakage of electromagnetic waves in the thawing chamber 110 through the mounting hole 140 and reducing radiation.

[0056] Please see Figure 3 In some embodiments, the radio frequency defrosting device 10 further includes a first connector 400, which is connected to the circuit board 310 and the waveguide 200. The probe 320 is disposed corresponding to the waveguide channel 221. Optionally, the first connector 400 has a connection channel 410 communicating with the waveguide channel 221, and the probe 320 is disposed within the connection channel 410.

[0057] As mentioned above, since the probe 320 receives feedback signals through the waveguide channel 221, it must be aligned with the waveguide channel 221 to ensure accurate detection. Because the connecting channel 410 is connected to the waveguide channel 221, and the probe 320 is disposed within the connecting channel 410, the probe 320 can be aligned with the waveguide channel 221. Furthermore, the first connector 400 also protects the probe 320, reducing damage to it.

[0058] In some embodiments, the radio frequency defrosting device 10 further includes a second connector 500 disposed on the outer surface of the waveguide 200, and the first connector 400 and the second connector 500 are detachably connected.

[0059] During the welding process between the waveguide 200 and the main body 100, welding deformation may occur, causing slight misalignment between the probe 320 and the waveguide channel 221, affecting the detection performance of the probe 320. Furthermore, the high temperature during welding may damage components on the circuit board 310. Therefore, the detector 300 needs to be detachably connected to the waveguide 200. That is, during the welding process of the waveguide 200, the detector 300 is separated from the waveguide 200. After the welding of the waveguide 200 is completed, the detector 300 is then installed onto the waveguide 200. In this way, the welding of the waveguide 200 can minimize its impact on the detector 300.

[0060] Since the first connector 400 is connected to the circuit board 310 and the second connector 500 is connected to the waveguide 200, the first connector 400 and the second connector 500 are detachably connected. That is, the detector 300 can be installed and removed from the waveguide 200 by connecting or separating the first connector 400 and the second connector 500.

[0061] Specifically, the first connector 400 and the second connector 500 can both be plastic parts, and the first connector 400 and the second connector 500 can be connected by detachable means such as screwing, riveting, or snap-fitting, without any restrictions.

[0062] Please see Figure 4 and Figure 5 In some embodiments, the waveguide 200 includes a mounting member 210 and a waveguide 220. The mounting member 210 is disposed in the mounting hole 140 and connected to the main body 100. The mounting member 210 has a mounting channel 212a communicating with the defrosting chamber 110. At least a portion of the waveguide 220 is installed in the mounting channel 212a and connected to the circuit board 310. The waveguide channel 221 is disposed in the waveguide 220.

[0063] Since the mounting channel 212a is connected to the thawing chamber 110, at least a portion of the waveguide 220 is installed within the mounting channel 212a, and the waveguide channel 221 is disposed within the waveguide 220, thus allowing the waveguide channel 221 to communicate with the thawing chamber 110. Because the waveguide 220 is connected to the circuit board 310, the probe 320 can be directly disposed within the waveguide channel 221, thereby enabling the probe 320 to receive infrared radiation from within the thawing chamber 110 through the waveguide channel 221.

[0064] The length of waveguide 220 is related to the wavelength of the radiated signal to be suppressed, and also to the size of the aperture of waveguide 220. For a cylindrical waveguide 220, its length is related to the diameter of the cylinder. For a cylindrical cutoff waveguide, the TE11 mode is the fundamental mode of the cylindrical waveguide, which is the propagation mode with the minimum cutoff frequency, VC:

[0065] Where kc is the cutoff wavenumber, ε and μ are the dielectric constant and permeability of the medium, and p 11 ′=1.841, c is the speed of light, and R is the radius of the waveguide. Cutoff frequency V C The radius R of the waveguide can be calculated based on the wavelength of the radiation signal to be suppressed, according to the above formula.

[0066] Microwaves experience significant losses during propagation due to the cutoff waveguide effect; their propagation constant is:

[0067] Here, k is the wave number, and the length of the waveguide can be calculated from the propagation constant β. Calculating the waveguide length from the propagation constant β is common knowledge in this field and will not be elaborated further. Of course, the length of the waveguide can also be obtained through simulation design using HFSS software.

[0068] Please see Figure 4 and Figure 5 In some embodiments, at least a portion of the outer wall of the waveguide 220 is provided with an external thread 222, and at least a portion of the inner wall of the mounting channel 212a is provided with an internal thread 212b that engages with the external thread 222.

[0069] The waveguide 220 is connected to the mounting channel 212a via a threaded structure, enabling the waveguide 220 to be installed in the mounting channel 212a. Because of this threaded connection, the waveguide 220 and the mounting component 210 are very tightly connected, effectively shielding radiation and reducing electromagnetic wave leakage through the gaps in the connection between the waveguide 220 and the mounting channel 212a. However, since the threaded structure is a discontinuous interface, electromagnetic waves entering the threaded structure will also be significantly attenuated during transmission.

[0070] Please see Figure 6 and Figure 7 In some embodiments, the mounting component 210 includes a connecting portion 211 and a mounting portion 212 disposed within the connecting portion 211. The connecting portion 211 is connected to the main body 100. A mounting channel 212a is disposed in the mounting portion 212. A stop edge 213 is provided at one end of the mounting portion 212 away from the detector 300. At least a portion of the waveguide 220 is inserted into the mounting channel 212a and abuts against the stop edge 213.

[0071] The waveguide 220 can also be installed by inserting it into the mounting channel 212a. In other words, the waveguide 220 and the mounting component 210 are detachably connected, allowing the waveguide 220 to be integrated with the circuit board 310. Specifically, after the mounting component 210 is soldered to the main body 100, the waveguide 220 is inserted into the mounting channel 212a to install the detector 300, thus preventing the soldering of the mounting component 210 from affecting the circuit board 310.

[0072] Since the waveguide 220 abuts against the stop edge 213, the stop edge 213 can limit the waveguide 220 in the axial direction of the waveguide channel 221, making the waveguide 220 more stable in the mounting channel 212a, so as to avoid the waveguide 220 moving away from the detector 300 in the mounting channel 212a, which would cause interference between the mounting component 210 and the components on the circuit board 310.

[0073] In some embodiments, the stop edge 213 is provided around the end of the mounting portion 212 to form a connecting hole 214 connecting the waveguide channel 221 and the thawing chamber 110.

[0074] The stop edge 213 is provided around the end of the mounting part 212, which increases the contact area between the stop edge 213 and the waveguide 220, making the stopping effect of the stop edge 213 on the waveguide 220 more sufficient. In order not to affect the communication between the waveguide channel 221 and the thawing chamber 110, the stop edge 213 forms a connecting hole 214 connecting the waveguide channel 221 and the thawing chamber 110, that is, the waveguide channel 221 is connected to the thawing chamber 110 through the connecting hole 214.

[0075] In some embodiments, the connecting hole 214 is coaxially arranged with the waveguide channel 221, and the radius of the connecting hole 214 is larger than the radius of the waveguide channel 221.

[0076] The connecting hole 214 is coaxially arranged with the waveguide channel 221, and the radius of the connecting hole 214 is larger than the radius of the waveguide channel 221. That is, the stop edge 213 only contacts the end face of the tube wall of the waveguide 220. The stop edge 213 is located outside the mounting channel 212a. Since the probe 320 receives infrared radiation through the waveguide channel 221, the stop edge 213 will not block the infrared light 321 emitted by the probe 320, so as to ensure the accuracy of the probe 320 detection.

[0077] Furthermore, a stepped structure 215 is formed between the stop edge 213 and the waveguide 220. Some electromagnetic waves will pass through the stepped structure 215 before entering the waveguide channel 221. Since the stepped structure 215 is a discontinuous interface, the electromagnetic waves will be attenuated by reflection on the stepped structure 215, thereby further enhancing the attenuation effect of radiation.

[0078] In some embodiments, the connecting portion 211 is connected to the outer surface of the main body 100, the mounting portion 212 is disposed in the mounting hole 140, and both ends of the mounting portion 212 extend out of the connecting portion 211.

[0079] The mounting portion 212 is disposed within the mounting hole 140, that is, the mounting portion 212 passes through the mounting opening. Since both ends of the mounting portion 212 extend with connecting portions 211, the electrical contact surface between the mounting portion 212 and the waveguide 220 is increased, making the fit between the mounting portion 212 and the waveguide 220 tighter and reducing electromagnetic waves leaking from the connection gap between the waveguide 220 and the mounting portion 212.

[0080] Please see Figure 3 In some embodiments, the main body 100 has a mounting surface 150, and the waveguide 200 is mounted on the mounting surface 150 and is set at an angle to the mounting surface 150, so that the axis of the waveguide channel 221 coincides with the center of the bottom surface of the thawing chamber 110.

[0081] Since the item 20 is placed on the bottom surface of the defrosting chamber 110, and the top surface of the main body 100 is positioned opposite the bottom surface of the defrosting chamber 110, the top surface of the main body 100 can be configured as a mounting surface 150 to facilitate the probe 320 receiving infrared radiation from the surface of the item 20. Because the probe 320 is positioned directly opposite the waveguide channel 221, and the axis of the waveguide channel 221 coincides with the center of the bottom surface of the defrosting chamber 110, the infrared light 321 emitted by the probe 320 can illuminate the center of the bottom surface, thereby ensuring that the temperature of food of various shapes can be monitored effectively during the defrosting process.

[0082] Since other components may be mounted on the mounting surface 150, the waveguide 200 must be positioned at any location on the mounting surface 150 without interfering with other components. When the mounting position of the waveguide 200 is directly opposite the center of the bottom surface of the thawing chamber 110, the waveguide 200 can be perpendicular to the mounting surface 150 so that the axis of the waveguide channel 221 coincides with the center of the bottom surface of the thawing chamber 110. When the mounting position of the waveguide 200 is misaligned with the center of the bottom surface of the thawing chamber 110, the waveguide 200 needs to be tilted so that the axis of the waveguide channel 221 coincides with the center of the bottom surface of the thawing chamber 110.

[0083] Based on the same inventive concept, this application also provides a refrigeration device, including a cabinet and the aforementioned radio frequency defrosting device 10. The radio frequency defrosting device 10 is disposed inside the cabinet, and the refrigeration device can be a refrigerator. The beneficial effects of the refrigeration device provided in this application are the same as those of the radio frequency defrosting device 10 described above, and will not be repeated here.

[0084] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

Claims

1. A radio frequency thawing device, characterized in that, include; The main body (100) has a thawing cavity (110) for containing the article (20). A waveguide (200) is mounted on the main body (100), and at least a portion of the waveguide (200) is located outside the thawing cavity (110). The waveguide (200) has a waveguide channel (221) communicating with the thawing cavity (110). The detector (300) includes a circuit board (310) and a probe (320) disposed on the circuit board (310). The detector (300) is mounted on the side of the waveguide (200) away from the thawing chamber (110), and the probe (320) is able to receive feedback signals from the item (20) in the thawing chamber (110) through the waveguide channel (221).

2. The radio frequency thawing device of claim 1, wherein, The main body (100) also has a mounting hole (140) communicating with the thawing chamber (110), and the waveguide (200) is disposed in the mounting hole (140) and connected to the main body (100).

3. The radio frequency thawing device of claim 2, wherein, The radio frequency defrosting device further includes a first connector (400), which is connected to the circuit board (310) and the waveguide (200). The probe (320) is set corresponding to the waveguide channel (221).

4. The radio frequency thawing apparatus of claim 3, wherein, The radio frequency defrosting device further includes a second connector (500), which is disposed on the outer surface of the waveguide (200), and the first connector (400) and the second connector (500) are detachably connected.

5. The radio frequency thawing apparatus of claim 2, wherein, The waveguide (200) includes a mounting member (210) and a waveguide (220). The mounting member (210) is disposed in the mounting hole (140) and connected to the main body (100). The mounting member (210) has a mounting channel (212a) communicating with the thawing chamber (110). At least a portion of the waveguide (220) is installed in the mounting channel (212a) and connected to the circuit board (310). The waveguide channel (221) is disposed in the waveguide (220).

6. The radio frequency thawing device of claim 5, wherein, At least a portion of the outer wall of the waveguide (220) is provided with an external thread (222), and at least a portion of the inner wall of the mounting channel (212a) is provided with an internal thread (212b) that engages with the external thread (222).

7. The radio frequency thawing apparatus of claim 5, wherein, The mounting component (210) includes a connecting part (211) and a mounting part (212) disposed within the connecting part (211). The connecting part (211) is connected to the main body (100). The mounting channel (212a) is disposed in the mounting part (212). A stop edge (213) is provided at one end of the mounting part (212) away from the detector (300). At least a portion of the waveguide (220) is inserted into the mounting channel (212a) and abuts against the stop edge (213).

8. The radio frequency thawing device of claim 7, wherein, The stop edge (213) is provided around the end of the mounting part (212) to form a connecting hole (214) connecting the waveguide channel (221) and the thawing chamber (110).

9. The radio frequency thawing device of claim 8, wherein, The connecting hole (214) is coaxially arranged with the waveguide channel (221), and the radius of the connecting hole (214) is larger than the radius of the waveguide channel (221).

10. The radio frequency thawing device of claim 7, wherein, The connecting part (211) is connected to the outer surface of the main body (100), the mounting part (212) is disposed in the mounting hole (140), and both ends of the mounting part (212) extend out of the connecting part (211).

11. The radio frequency thawing apparatus of any of claims 1-10, wherein, The main body (100) has a mounting surface (150), and the waveguide (200) is mounted on the mounting surface (150) and is set at an angle to the mounting surface (150) so that the axis of the waveguide channel (221) coincides with the center of the bottom surface of the thawing chamber (110).

12. A refrigeration appliance characterized in that, It includes a cabinet and a radio frequency defrosting device (10) as described in any one of claims 1-11, wherein the radio frequency defrosting device (10) is disposed within the cabinet.

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